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Record: 10235 (26/09/2023)
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LNER Peppercorn "A1" Class 4-6-2
Class Types
LNER Class |
A1 |
General
Designer |
Arthur Peppercorn |
Introduced |
1948 |
Grouping Company |
London and North Eastern Railway |
Description (1957) |
Class A1, a slightly modified version of class A1/1, built by Mr. A. H. Peppercorn in 1948 and 1949. 6'8" wheels, 250 lbs. pressure, 3 cylinders, 19 x 26 ins. |
Wheel Arrangement |
4-6-2 |
Number Built as A1 |
50 |
Number Scrapped |
49 |
Number Preserved |
1 |
First in Service |
06/08/1948 |
Last in Service |
19/06/1966 |
Manufacturers |
|
Orders |
|
|
|
|
Power
|
Standard |
Timken |
Variant Introduced |
1948 |
1949 |
Miscellaneous Differences |
|
Timken Roller Bearings |
Tractive Effort |
37,397lbs |
As Standard |
Inside Cylinders |
19" x 26" (1 off) |
As Standard |
Inside Valves |
10"Piston |
As Standard |
Inside Motion |
Walschaerts |
As Standard |
Outside Cylinders |
19" x 26" (2 off) |
As Standard |
Outside Valves |
10"Piston |
As Standard |
Outside Motion |
Walschaerts |
As Standard |
Wheels
|
Standard |
Timken |
Pony |
3' 2" |
As Standard |
Drivers |
6' 8" |
As Standard |
Truck |
3' 8" |
As Standard |
Locomotive Wheelbase |
36' 3" |
As Standard |
Tender Wheelbase |
16' |
As Standard |
Total Wheelbase |
62' 51⁄4" |
As Standard |
Descriptive Wheelbase |
6' 3" + 5' 9" + 7' 3" + 7' 3" + 9' 9" + 10 2¼" + 5' 3" + 5' 6" + 5' 3" = 62 5¼" |
As Standard |
Dimensions
|
Standard |
Timken |
Length (over buffers) |
72' 113⁄4" |
As Standard |
Weight (in running order) |
164t 9cwt |
166t 2cwt |
Weight (loco only) |
104t 2cwt |
105t 4cwt |
Adhesive Weight |
66t 0cwt |
66t 11cwt |
Maximum Axle Load |
22t 0cwt |
22t 7cwt |
Water Capacity |
5,000gal |
As Standard |
Coal Capacity |
9t 0cwt |
As Standard |
Boiler & Firebox
|
Standard |
Timken |
Boiler Diagram |
118 |
As Standard |
Boiler Max Diameter |
6' 5" |
As Standard |
Boiler Barrel Length |
16' 115⁄8" |
As Standard |
Boiler Pressure |
250lbs |
As Standard |
Boiler Pitch |
9' 41⁄2" |
As Standard |
Firebox Type |
Belpaire |
As Standard |
Firebox Length |
11' 41⁄8" |
As Standard |
Firebox Grate Area |
50ft2 |
As Standard |
Firebox Heating Surface |
245.3ft2 |
As Standard |
Tube Number |
121 |
As Standard |
Tube Diameter |
21⁄4" |
As Standard |
Tube Area |
1211.57ft2 |
As Standard |
Flue Elements |
43 |
As Standard |
Flue Diameter |
51⁄4" |
As Standard |
Flue Area |
1004.5ft2 |
As Standard |
Total Evaporative Area |
2461.37ft2 |
As Standard |
Superheater Elements |
43 |
As Standard |
Superheater Element Diameter |
1.244" |
As Standard |
Superheater Element Area |
679.67ft2 |
As Standard |
Total Heating Area |
3141.04ft2 |
As Standard |
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